First Measurement of Transverse-Spin-Dependent Azimuthal Asymmetries in the Drell-Yan Process.

Autor: Aghasyan M; Trieste Section of INFN, 34127 Trieste, Italy., Akhunzyanov R; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Alexeev GD; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Alexeev MG; University of Turin, Department of Physics, 10125 Turin, Italy., Amoroso A; University of Turin, Department of Physics, 10125 Turin, Italy.; Torino Section of INFN, 10125 Turin, Italy., Andrieux V; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA., Anfimov NV; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Anosov V; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Antoshkin A; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Augsten K; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.; Czech Technical University in Prague, 16636 Prague, Czech Republic., Augustyniak W; National Centre for Nuclear Research, 00-681 Warsaw, Poland., Austregesilo A; Technische Universität München, Physik Department , 85748 Garching, Germany., Azevedo CDR; University of Aveiro, Department of Physics, 3810-193 Aveiro, Portugal., Badełek B; University of Warsaw, Faculty of Physics, 02-093 Warsaw, Poland., Balestra F; University of Turin, Department of Physics, 10125 Turin, Italy.; Torino Section of INFN, 10125 Turin, Italy., Ball M; Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany., Barth J; Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany., Beck R; Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany., Bedfer Y; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France., Bernhard J; CERN, 1211 Geneva 23, Switzerland.; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany., Bicker K; CERN, 1211 Geneva 23, Switzerland.; Technische Universität München, Physik Department , 85748 Garching, Germany., Bielert ER; CERN, 1211 Geneva 23, Switzerland., Birsa R; Trieste Section of INFN, 34127 Trieste, Italy., Bodlak M; Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic., Bordalo P; LIP, 1000-149 Lisbon, Portugal., Bradamante F; University of Trieste, Department of Physics, 34127 Trieste, Italy.; Trieste Section of INFN, 34127 Trieste, Italy., Bressan A; University of Trieste, Department of Physics, 34127 Trieste, Italy.; Trieste Section of INFN, 34127 Trieste, Italy., Büchele M; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Chang WC; Academia Sinica, Institute of Physics, Taipei 11529, Taiwan., Chatterjee C; Matrivani Institute of Experimental Research and Education, Calcutta 700 030, India., Chiosso M; University of Turin, Department of Physics, 10125 Turin, Italy.; Torino Section of INFN, 10125 Turin, Italy., Choi I; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA., Chung SU; Technische Universität München, Physik Department , 85748 Garching, Germany., Cicuttin A; Trieste Section of INFN, 34127 Trieste, Italy., Crespo ML; Trieste Section of INFN, 34127 Trieste, Italy., Dalla Torre S; Trieste Section of INFN, 34127 Trieste, Italy., Dasgupta SS; Matrivani Institute of Experimental Research and Education, Calcutta 700 030, India., Dasgupta S; University of Trieste, Department of Physics, 34127 Trieste, Italy.; Trieste Section of INFN, 34127 Trieste, Italy., Denisov OY; Torino Section of INFN, 10125 Turin, Italy., Dhara L; Matrivani Institute of Experimental Research and Education, Calcutta 700 030, India., Donskov SV; State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute,' 142281 Protvino, Russia., Doshita N; Yamagata University, Yamagata 992-8510, Japan., Dreisbach C; Technische Universität München, Physik Department , 85748 Garching, Germany., Dünnweber W; University of Aveiro, Department of Physics, 3810-193 Aveiro, Portugal.; Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany.; Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany.; Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany.; Institute of Scientific Instruments, AS CR, 61264 Brno, Czech Republic.; Matrivani Institute of Experimental Research and Education, Calcutta 700 030, India.; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.; CERN, 1211 Geneva 23, Switzerland.; Technical University in Liberec, 46117 Liberec, Czech Republic.; LIP, 1000-149 Lisbon, Portugal.; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany.; University of Miyazaki, Miyazaki 889-2192, Japan.; Lebedev Physical Institute, 119991 Moscow, Russia.; Technische Universität München, Physik Department , 85748 Garching, Germany.; Nagoya University, 464 Nagoya, Japan.; Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic.; Czech Technical University in Prague, 16636 Prague, Czech Republic.; State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute,' 142281 Protvino, Russia.; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.; Academia Sinica, Institute of Physics, Taipei 11529, Taiwan.; Tel Aviv University, School of Physics and Astronomy, 69978 Tel Aviv, Israel.; University of Trieste, Department of Physics, 34127 Trieste, Italy.; Trieste Section of INFN, 34127 Trieste, Italy.; University of Turin, Department of Physics, 10125 Turin, Italy.; Torino Section of INFN, 10125 Turin, Italy.; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA.; National Centre for Nuclear Research, 00-681 Warsaw, Poland.; University of Warsaw, Faculty of Physics, 02-093 Warsaw, Poland.; Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland.; Yamagata University, Yamagata 992-8510, Japan., Dziewiecki M; Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland., Efremov A; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Eversheim PD; Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany., Faessler M; University of Aveiro, Department of Physics, 3810-193 Aveiro, Portugal.; Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany.; Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany.; Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany.; Institute of Scientific Instruments, AS CR, 61264 Brno, Czech Republic.; Matrivani Institute of Experimental Research and Education, Calcutta 700 030, India.; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.; CERN, 1211 Geneva 23, Switzerland.; Technical University in Liberec, 46117 Liberec, Czech Republic.; LIP, 1000-149 Lisbon, Portugal.; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany.; University of Miyazaki, Miyazaki 889-2192, Japan.; Lebedev Physical Institute, 119991 Moscow, Russia.; Technische Universität München, Physik Department , 85748 Garching, Germany.; Nagoya University, 464 Nagoya, Japan.; Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic.; Czech Technical University in Prague, 16636 Prague, Czech Republic.; State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute,' 142281 Protvino, Russia.; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.; Academia Sinica, Institute of Physics, Taipei 11529, Taiwan.; Tel Aviv University, School of Physics and Astronomy, 69978 Tel Aviv, Israel.; University of Trieste, Department of Physics, 34127 Trieste, Italy.; Trieste Section of INFN, 34127 Trieste, Italy.; University of Turin, Department of Physics, 10125 Turin, Italy.; Torino Section of INFN, 10125 Turin, Italy.; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA.; National Centre for Nuclear Research, 00-681 Warsaw, Poland.; University of Warsaw, Faculty of Physics, 02-093 Warsaw, Poland.; Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland.; Yamagata University, Yamagata 992-8510, Japan., Ferrero A; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France., Finger M; Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic., Finger M; Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic., Fischer H; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Franco C; LIP, 1000-149 Lisbon, Portugal., du Fresne von Hohenesche N; CERN, 1211 Geneva 23, Switzerland.; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany., Friedrich JM; Technische Universität München, Physik Department , 85748 Garching, Germany., Frolov V; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.; CERN, 1211 Geneva 23, Switzerland., Fuchey E; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France., Gautheron F; Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany., Gavrichtchouk OP; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Gerassimov S; Lebedev Physical Institute, 119991 Moscow, Russia.; Technische Universität München, Physik Department , 85748 Garching, Germany., Giarra J; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany., Giordano F; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA., Gnesi I; University of Turin, Department of Physics, 10125 Turin, Italy.; Torino Section of INFN, 10125 Turin, Italy., Gorzellik M; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Grasso A; University of Turin, Department of Physics, 10125 Turin, Italy.; Torino Section of INFN, 10125 Turin, Italy., Grosse Perdekamp M; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA., Grube B; Technische Universität München, Physik Department , 85748 Garching, Germany., Grussenmeyer T; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Guskov A; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Hahne D; Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany., Hamar G; Trieste Section of INFN, 34127 Trieste, Italy., von Harrach D; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany., Heinsius FH; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Heitz R; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA., Herrmann F; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Horikawa N; Nagoya University, 464 Nagoya, Japan., d'Hose N; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France., Hsieh CY; Academia Sinica, Institute of Physics, Taipei 11529, Taiwan., Huber S; Technische Universität München, Physik Department , 85748 Garching, Germany., Ishimoto S; Yamagata University, Yamagata 992-8510, Japan., Ivanov A; University of Turin, Department of Physics, 10125 Turin, Italy.; Torino Section of INFN, 10125 Turin, Italy., Ivanshin Y; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Iwata T; Yamagata University, Yamagata 992-8510, Japan., Jary V; Czech Technical University in Prague, 16636 Prague, Czech Republic., Joosten R; Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany., Jörg P; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Kabuß E; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany., Kerbizi A; University of Trieste, Department of Physics, 34127 Trieste, Italy.; Trieste Section of INFN, 34127 Trieste, Italy., Ketzer B; Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany., Khaustov GV; State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute,' 142281 Protvino, Russia., Khokhlov YA; State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute,' 142281 Protvino, Russia., Kisselev Y; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Klein F; Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany., Koivuniemi JH; Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany.; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA., Kolosov VN; State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute,' 142281 Protvino, Russia., Kondo K; Yamagata University, Yamagata 992-8510, Japan., Königsmann K; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Konorov I; Lebedev Physical Institute, 119991 Moscow, Russia.; Technische Universität München, Physik Department , 85748 Garching, Germany., Konstantinov VF; State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute,' 142281 Protvino, Russia., Kotzinian AM; University of Turin, Department of Physics, 10125 Turin, Italy.; Torino Section of INFN, 10125 Turin, Italy., Kouznetsov OM; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Kral Z; Czech Technical University in Prague, 16636 Prague, Czech Republic., Krämer M; Technische Universität München, Physik Department , 85748 Garching, Germany., Kremser P; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Krinner F; Technische Universität München, Physik Department , 85748 Garching, Germany., Kroumchtein ZV; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Kulinich Y; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA., Kunne F; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France., Kurek K; National Centre for Nuclear Research, 00-681 Warsaw, Poland., Kurjata RP; Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland., Kveton A; Czech Technical University in Prague, 16636 Prague, Czech Republic., Lednev AA; State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute,' 142281 Protvino, Russia., Levillain M; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France., Levorato S; Trieste Section of INFN, 34127 Trieste, Italy., Lian YS; Academia Sinica, Institute of Physics, Taipei 11529, Taiwan., Lichtenstadt J; Tel Aviv University, School of Physics and Astronomy, 69978 Tel Aviv, Israel., Longo R; University of Turin, Department of Physics, 10125 Turin, Italy.; Torino Section of INFN, 10125 Turin, Italy., Maggiora A; Torino Section of INFN, 10125 Turin, Italy., Magnon A; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA., Makins N; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA., Makke N; Trieste Section of INFN, 34127 Trieste, Italy., Mallot GK; CERN, 1211 Geneva 23, Switzerland., Marianski B; National Centre for Nuclear Research, 00-681 Warsaw, Poland., Martin A; University of Trieste, Department of Physics, 34127 Trieste, Italy.; Trieste Section of INFN, 34127 Trieste, Italy., Marzec J; Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland., Matoušek J; Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic.; University of Trieste, Department of Physics, 34127 Trieste, Italy.; Trieste Section of INFN, 34127 Trieste, Italy., Matsuda H; Yamagata University, Yamagata 992-8510, Japan., Matsuda T; University of Miyazaki, Miyazaki 889-2192, Japan., Meshcheryakov GV; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Meyer M; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA., Meyer W; Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany., Mikhailov YV; State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute,' 142281 Protvino, Russia., Mikhasenko M; Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany., Mitrofanov E; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Mitrofanov N; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Miyachi Y; Yamagata University, Yamagata 992-8510, Japan., Nagaytsev A; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Nerling F; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany., Neyret D; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France., Nový J; CERN, 1211 Geneva 23, Switzerland.; Czech Technical University in Prague, 16636 Prague, Czech Republic., Nowak WD; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany., Nukazuka G; Yamagata University, Yamagata 992-8510, Japan., Nunes AS; LIP, 1000-149 Lisbon, Portugal., Olshevsky AG; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Orlov I; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Ostrick M; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany., Panzieri D; Torino Section of INFN, 10125 Turin, Italy., Parsamyan B; University of Turin, Department of Physics, 10125 Turin, Italy.; Torino Section of INFN, 10125 Turin, Italy., Paul S; Technische Universität München, Physik Department , 85748 Garching, Germany., Peng JC; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA., Pereira F; University of Aveiro, Department of Physics, 3810-193 Aveiro, Portugal., Pešek M; Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic., Peshekhonov DV; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Pierre N; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany.; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France., Platchkov S; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France., Pochodzalla J; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany., Polyakov VA; State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute,' 142281 Protvino, Russia., Pretz J; Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany., Quaresma M; LIP, 1000-149 Lisbon, Portugal., Quintans C; LIP, 1000-149 Lisbon, Portugal., Ramos S; LIP, 1000-149 Lisbon, Portugal., Regali C; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Reicherz G; Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany., Riedl C; University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA., Rogacheva NS; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Roskot M; Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic., Ryabchikov DI; Technische Universität München, Physik Department , 85748 Garching, Germany.; State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute,' 142281 Protvino, Russia., Rybnikov A; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Rychter A; Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland., Salac R; Czech Technical University in Prague, 16636 Prague, Czech Republic., Samoylenko VD; State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute,' 142281 Protvino, Russia., Sandacz A; National Centre for Nuclear Research, 00-681 Warsaw, Poland., Santos C; Trieste Section of INFN, 34127 Trieste, Italy., Sarkar S; Matrivani Institute of Experimental Research and Education, Calcutta 700 030, India., Savin IA; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Sawada T; Academia Sinica, Institute of Physics, Taipei 11529, Taiwan., Sbrizzai G; University of Trieste, Department of Physics, 34127 Trieste, Italy.; Trieste Section of INFN, 34127 Trieste, Italy., Schiavon P; University of Trieste, Department of Physics, 34127 Trieste, Italy.; Trieste Section of INFN, 34127 Trieste, Italy., Schmidt K; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Schmieden H; Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany., Schönning K; CERN, 1211 Geneva 23, Switzerland., Seder E; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France., Selyunin A; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Shevchenko OY; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Silva L; LIP, 1000-149 Lisbon, Portugal., Sinha L; Matrivani Institute of Experimental Research and Education, Calcutta 700 030, India., Sirtl S; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Slunecka M; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Smolik J; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Srnka A; Institute of Scientific Instruments, AS CR, 61264 Brno, Czech Republic., Steffen D; CERN, 1211 Geneva 23, Switzerland.; Technische Universität München, Physik Department , 85748 Garching, Germany., Stolarski M; LIP, 1000-149 Lisbon, Portugal., Subrt O; CERN, 1211 Geneva 23, Switzerland.; Czech Technical University in Prague, 16636 Prague, Czech Republic., Sulc M; Technical University in Liberec, 46117 Liberec, Czech Republic., Suzuki H; Yamagata University, Yamagata 992-8510, Japan., Szabelski A; University of Trieste, Department of Physics, 34127 Trieste, Italy.; Trieste Section of INFN, 34127 Trieste, Italy.; National Centre for Nuclear Research, 00-681 Warsaw, Poland., Szameitat T; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Sznajder P; National Centre for Nuclear Research, 00-681 Warsaw, Poland., Takewaka S; University of Turin, Department of Physics, 10125 Turin, Italy.; Torino Section of INFN, 10125 Turin, Italy., Tasevsky M; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Tessaro S; Trieste Section of INFN, 34127 Trieste, Italy., Terça G; LIP, 1000-149 Lisbon, Portugal., Tessarotto F; Trieste Section of INFN, 34127 Trieste, Italy., Thiel A; Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany., Tomsa J; Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic., Tosello F; Torino Section of INFN, 10125 Turin, Italy., Tskhay V; Lebedev Physical Institute, 119991 Moscow, Russia., Uhl S; Technische Universität München, Physik Department , 85748 Garching, Germany., Vauth A; CERN, 1211 Geneva 23, Switzerland., Veloso J; University of Aveiro, Department of Physics, 3810-193 Aveiro, Portugal., Virius M; Czech Technical University in Prague, 16636 Prague, Czech Republic., Vit M; University of Turin, Department of Physics, 10125 Turin, Italy., Vondra J; Czech Technical University in Prague, 16636 Prague, Czech Republic., Wallner S; Technische Universität München, Physik Department , 85748 Garching, Germany., Weisrock T; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany., Wilfert M; Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany., Ter Wolbeek J; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany., Zaremba K; Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland., Zavada P; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Zavertyaev M; Lebedev Physical Institute, 119991 Moscow, Russia., Zemlyanichkina E; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Zhuravlev N; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia., Ziembicki M; Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2017 Sep 15; Vol. 119 (11), pp. 112002. Date of Electronic Publication: 2017 Sep 12.
DOI: 10.1103/PhysRevLett.119.112002
Abstrakt: The first measurement of transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan (DY) process is reported. We use the CERN SPS 190  GeV/c π^{-} beam and a transversely polarized ammonia target. Three azimuthal asymmetries giving access to different transverse-momentum-dependent (TMD) parton distribution functions (PDFs) are extracted using dimuon events with invariant mass between 4.3  GeV/c^{2} and 8.5  GeV/c^{2}. Within the experimental uncertainties, the observed sign of the Sivers asymmetry is found to be consistent with the fundamental prediction of quantum chromodynamics (QCD) that the Sivers TMD PDFs extracted from DY have a sign opposite to the one extracted from semi-inclusive deep-inelastic scattering (SIDIS) data. We present two other asymmetries originating from the pion Boer-Mulders TMD PDFs convoluted with either the nucleon transversity or pretzelosity TMD PDFs. A recent COMPASS SIDIS measurement was obtained at a hard scale comparable to that of these DY results. This opens the way for possible tests of fundamental QCD universality predictions.
Databáze: MEDLINE